斜坡散粒体冲击拦挡墙的峰值冲击力测试研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (18) : 219-227.

论文

袁进科，陈杰

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Peak impact force test of a slope granular impact retaining wall

YUAN Jinke,CHEN Jie

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文章历史 +

摘要

斜坡散粒体的峰值冲击力是散粒体防护设计中的重要控制参数。针对峰值冲击力的影响因素，通过设计的斜坡散粒体冲击模拟试验系统，选取散粒体颗粒不同重量、颗粒形状、冲击速度、入射角度以及拦挡墙厚度作为试验参数，开展斜坡散粒体对拦挡墙的冲击模拟试验，分析各因素与峰值冲击力的相互关系。结果表明：散粒体颗粒冲击拦挡墙的峰值冲击力分布在拦挡墙中部位置，在90°入射角度时球形颗粒散粒体的峰值冲击力最大，冲击力时程曲线具有非线性特征，分为线性增加、非线性减小和趋于稳定阶段。对于峰值冲击力的影响重要性程度是颗粒形状＞冲击速度＞散粒体重量＞挡墙厚度＞冲击入射角度。中国泥石流规范中的冲击力计算量值与峰值冲击力实测值比较接近，同时隧道手册法考虑了拦挡墙材料性质及结构特征，两种计算方法相结合可为斜坡散粒体灾害的防治设计提供参考依据。
关键词：斜坡；散粒体；拦挡墙；峰值冲击力；物理模拟；

Abstract

The peak impact force of slope granule is an important control parameter in the design of granular protection. Through the designed slope granular impact test device, the different weight, particle shape, impact velocity, incident angle and thickness of barrier wall are selected as the test parameters to carry out the slope granular impact simulation test. The impact simulation test of the retaining wall analyzes the relationship between factors and peak impact force. The results show that the peak impact force of granular particles impacting the retaining wall is distributed in the middle of the wall. The peak impact force of spherical particles and granular particles is the largest at an incident angle of 90°. The time history curve of the impact force has nonlinear characteristics: Linear increase, non-linear decrease and stabilization stage. The degree of importance of peak impact force is particle shape>impact velocity>weight of granular body>retaining wall thickness>impact angle of incidence. The calculated value of impact force in Chinese debris flow code is relatively close to the measured value, the
tunnel manual method takes into account the material properties and structural characteristics of the retaining wall. The combination of two calculation methods provide a reference for prevention and control of granular disasters.
Keywords: slope; granular; retaining wall; peak impact force; physical simulation;

导出引用

袁进科，陈杰. 斜坡散粒体冲击拦挡墙的峰值冲击力测试研究[J]. 振动与冲击, 2022, 41(18): 219-227

YUAN Jinke,CHEN Jie. Peak impact force test of a slope granular impact retaining wall[J]. Journal of Vibration and Shock, 2022, 41(18): 219-227

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